December 9, 2016 - 3:15pm - 4:00pm
Polymeric Nanofibers/Antimicrobial Formulations Using a Novel Co-extrusion Approach Compared with Electrospinning for Transderaml Drug Delivery Applications
The primary objective of the present work was to compare polymeric nanofibers fabricated using a novel co-extrusion technique and electrospining process for development of transdermal patches which can be used for drug administration. Drug loaded transdermal patches are gaining prominence not only because of their non-invasiveness but also due to their lower toxicity compared with other transdermal drug delivery systems. The high surface to volume ratio and microporous structure of polymeric patches make them a good candidate for transdermal delivery systems to compete with products currently available on the market. Also, the possibility of large scale production combined with the simplicity of the co-extrusion process make this technique very attractive for commercialization.
Rational Design of Metal-free Nitrogen-doped Graphene / Carbon Nanotubes Composites for Energy Conversion and Storage
Metal-free carbonaceous catalysts are promising alternative materials to Pt for oxygen reduction reaction. However, most electrochemical characterization on metal-free catalysts are conducted in alkaline electrolytes by a half-cell setup. In acidic environments, they are usually less active than metal containing catalysts. In reality, applying metal-free catalysts in PEM fuel cells shall be more urgent and important, although it is still not studied well so far. Herein, I have rationally designed and prepared nitrogen-doped graphene/carbon nanotubes (N-G-CNT) composites, and demonstrated its significantly better long-term operational stabilities and comparable gravimetric power densities with respect to the best NPMC in acidic PEM cells. This investigation represents a major breakthrough in removing the bottlenecks to translate low-cost, metal-free, carbon-based ORR catalysts up to commercialization stage, and opens avenues for clean energy generation from an affordable and durable fuel cell. Besides, the 3D N-G-CNT with well-defined porous structure shows high electrochemical capacitance, making it promising electrode material for supercapacitors.